1,3-Isobenzofurandione, polymer with 2,5-furandione and 1,2-propanediol, benzoate 67989-07-5 68015-75-8 70850-99-6 75285-55-1 Phthalic anhydride, maleic anhydride, benzoic acid, propylene glycol polymer Phthalic anhydride, maleic anhydride, propylene glycol polymer, benzoate Propylene glycol, benzoic acid, maleic anhydride, phthalic anhydride polymer